/Engine/Plugins/Experimental/Mutable/Source/MutableRuntime/Public/MuR/System.h
A call to BeginUpdate must be paired with a call to EndUpdate once the returned data has been processed.
the instance data with all the LOD, components, and ids to generate the meshes and images. The returnedInstanceis only valid until the next call to EndUpdate with the same instanceID parameter.
const [Instance](API\Plugins\MutableRuntime\MuR\Instance) * BeginUpdate ( [Instance::ID](API\Plugins\MutableRuntime\MuR\Instance\ID) InstanceID, const [Ptr](API\Plugins\CustomizableObject\MuCO\Ptr)< const [Parameters](API\Plugins\MutableRuntime\MuR\Parameters) > & Params, int32 StateIndex, uint32 LodMask )